Bending appliance.



; -W 3% a a J. W. JOHNSON, W. A. BAUERIS, P. J. JENSEN & W. D. LAWSHE.

' BENDING APPLIANCE.

APPLIOATION FILED AUG. 15, 1011.,

1,026,916. I Patented May 21, 1912.

Mom/1M3 COLUMBIA WRAP" C0,. WNW, D- C.

UNITED STAQES PATENT OFFICE.

JOHN \IV. JOHNSON, WILLIAM A. BAUERIS, PETER J. JENSEN, AND WALTER D.LAWSHE, OF SEATTLE, WASHINGTON.

BENDING APPLIANCE.

Specification of Letters Patent.

Patented May 21, 1912.

To all whom it may concern:

Be it known that we, J OIIN 7. J onNsoN, \VILLIAM A. BAUERIS, ln'rnn J.JnNsnN, and \VALTER D. Lawsrrn, citizens of the United States, residingat Seattle, in the county of King and State of \Vashington, haveinvented certain new and useful Improvements in Bending Appliances, ofwhich the following is a specification.

Our invention relates to bending appliances and has for a primary objectthe provision of a simplified and improved construction through themedium of which the bending operation can be carried on in an efficientmanner.

Other objects will be set forth as our description progresses and thosefeatures of construction, arrangements and combinations of parts onwhich we desire protection, succinctly defined in our annexed claims.

Referring to the accompanying drawing wherein like numerals of referenceindicate like parts throughout: Figure 1 is a side elevation, in partialsection, of our invention. Fig. 2 is a top plan thereof, a portion ofthe actuating lever being removed. Fig. 3 is a fragmentary sideelevation of the ap' plianee with the bending member held in itselevated or inactive position, and Fig. 4 is a section on line 44 ofFig. 3.

In carrying out our invention, we provide a main frame comprising sidebars 1 which are rigidly held in spaced relation by connecting members2, 2, conveniently formed with apertures, as 3, through which suitablesecuring bolts, not shown, are passed for securing the device inposition for use. Side bars 1 have parallel rear end portions 1 merginginto forwardly diverging portions 1", which latter carry the workholding jaws 4, these, as now considered, being formed by bending theside bars to provide hook shaped forward end portions thereto. Arrangedbetween jaws 4 is a reciprocatory bending member 6, the same beingguided between vertical standards 7, of frame connecting member 2, andpivotally connected to the short arm 8 of an actuating lever 8,swingingly supported on a shaft 8 mounted in the end portions 1 ofbars 1. Bending member 6 consists of a bar formed on its lower face witha series of shoulders or working engaging parts 9, spaced lengthwise ofsaid member for successive engagement with the bar or other article tobe bent. Intermediate cngaging parts 9 are cam surfaces 10, the samebeing inclined forwardly in a downward direction so as to ride over thework during the rear stroke of member 6 and thereby permit of the nextengaging part being positioned for engagement with the work to effectfurther bending of the latter during the next advance movement of member6.

Reference numeral 11. indicates removable facings for jaws 4, thosehaving relatively long and short side arm extensions 12, adapted toextend on opposite sides of the adjacent jaws. The longer of these armextensions is formed with an aperture for reception of a screw bolt 13which is normally removably engaged in the jaw, as shown.

For holding the bending member 6 elevated (see Fig. 3), to therebypermit of the work being properly seated in jaws 4, we provide a restconsisting of a pin 14, adapted to be inserted into suitable aperturesprovided in the upper end portions of standards 7.

Assuming that a bar, as 15, is positioned in jaws 4, and bending member6 lowered to bear on the same, as illustrated in Figs. 1 and 2, lever 8is elevated until the first shoulder 9 is engaged with said bar, andthen swung downwardly to advance member 6.

To obtain uniformity in the bending of the work, we propose that lever 8shall be swung downwardly a predetermined distance during each operationthereof when, for example, its movement can be arrested through contactwith'the ground. To vary the extent of bend to the work under suchconditions, we provide the removable facings 11 which obviously can beof any suitable thickness.

Rearwardly of jaws 4, side bars 1 are provided with stops t which serveto hold the work against backward movement with the bending member 6.

Having thus described our invention,what we claim as new and desire tosecure by Letters Patent of the United States of America, is:

1. A bending appliance comprising a support, spaced work holding jaws onsaid support, a reciprocatory bending member arranged between said. jawsand provided with a plurality of work engaging parts spaced in thedirection of its length for alternative engagement with the work by andduring movement of sald member,.and means for reciprocating said member.

2. A bending appliance comprising a support, spaced work holding jaws onsaid sup port, a reciprocatory bending member arranged between said jawsand provided on its under side with a plurality of engaging parts spacedin the direction of its length for alternative engagement with the work,said member being provided with cam surfaces intermediate said engagingparts for riding on the work during retractive movement of said member,and means for reciprocating said member.

3. A bending appliance comprising a support, spaced work holding jaws onsaid sup port, a reciprocato-ry bending member arranged between saidjaws and provided with a plurality of engaging parts, said engagingparts being spaced lengthwise of said member for alternative engagementwith the work, and a lever fulcrumed on said support and connected tosaid member for reciprocating the same.

4. A bending appliance comprising a support, spaced work holding jaws onsaid support, a bending member comprising a bar provided on its lowerface with a plurality of shoulders and intermediate forwardly anddownwardly inclined cam surfaces, said shoulders and cam surfaces beingspaced lengthwise of said member, and means for reciprocating saidmember.

5. A bending appliance comprising a support, spaced work holding jaws onsaid support, a bending member arranged between said jaws and providedon its under face with a plurality of work engaging parts spaced in thedirection of its length, a lever fulcrumed on said frame and pivotallyconnected with said member for reciprocating the same, verticalstandards on said support on opposite sides of said member, and means onsaid standards for holding said member elevated from said jaws.

6. A bending appliance comprising a support, spaced work holding jaws onsaid support, a bending member provided with a plurality of workengaging parts spaced in the direction of its length for alternativeengagement with the work, and means for reciprocating said bendingmember between said jaws, said bending member being free for angularmovement relatively to the work to thereby permit of the engagement anddisengagement of its work engaging parts with respect to the work.

In testimony whereof we aflix our signatures in presence of twowitnesses.

JOHN W. J OI-INSON., VILLIAM A. BAUERIS. PETER J. JENSEN. WALTER D.LAWSHE.

Witnesses:

AnLrrA ADAMS, JAMES E. SPROLL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

